Hello!
Yes, the missing file handle was a silly mistake.
However after the file write I need c.txt to look like this, gramm. category against matched word:

Here noun I am verb this is me Theres advb nowhere else on earth Id ra
+ther be
[download]

which the this code does not do:

foreach (keys %tagdict){
  print CF $tagdict{$_} if exists $tagcorpus{$_};
}
[download]

I've tried to do this in another round-about way,but there's
a problem with this is too.Here's the code:

open DF, 'd.txt' or die $!;
my %tagdict;  
while (<DF>) {  
chomp;  
my ($word, $cat) = split;
$tagdict{$word} = $cat; 
}

while ( ($k,$v) = each %tagdict ) {
#print "$k => $v\n";
}

close DF;

open CF, '+<c.txt' or die $!;
my %tagcorpus;  

while (<CF>) {  
chomp;  

my @cwords = split; 
@tagcorpus{@cwords} = (1) x @cwords;   
}

while ( ($k,$v) = each %tagcorpus ) {
#print "$k => $v\n";
}

close CF;

open CF, '+<c.txt' or die $!;

seek CF, 0, 0; # go to start of file 
   truncate CF, 0; 
       
       foreach $ditem(keys %tagdict){
               #print "\n$ditem";
               
           foreach $vitem(values %tagdict){
               #print "\n$vitem";
                
           $_ = process($_);
           #print $_;
           
           print CF; 
               print CF " ";
               
               foreach $citem(keys %tagcorpus) { 
                       #print "\n$vitem";
               
                       my $currentposition=tell CF;
                       seek CF,0,1 ;
                      if ($citem eq $ditem){
                       syswrite CF,"$vitem",4 ;
                
                        }    
                   }
                 }
              } 
   close CF;
   
sub process{


foreach $key(keys %tagcorpus){ 
  #print "\n$key";
  return($key);
 }
 
}           
1;
[download]

The problem is in this part:

 foreach $key(keys %tagcorpus){ 
  #print "\n$key";
  return($key);
 }
[download]

I can't figure out why the print statement keeps printing
the same word as a key value.Towards the top of the program in

 while ( ($k,$v) = each %tagcorpus ) {
#print "$k => $v\n";
}
[download]

the key and value pairs are being printed properly.

If this is solved the file write should work, I have used
this same code elsewhere.What is the problem here?
Thanx.

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